fix: recover memtable options when opening physical regions

[v0y4g3r]

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What's changed and what's your intention?

During creating physical regions for metric engine, index and memtable options are set manually:

greptimedb/src/metric-engine/src/engine/create.rs

Lines 482 to 485 in df01ac0

	set_index_options_for_data_region(&mut data_region_request.options);
	// Set memtable options.
	set_memtable_options_for_data_region(&mut data_region_request.options);

But when open physical regions, only index options are set:

greptimedb/src/metric-engine/src/engine/open.rs

Line 83 in d1838fb

set_index_options_for_data_region(&mut data_region_options);

Memory usage

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

[waynexia]

Core tech ⚡

[fengjiachun]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.17%. Comparing base (d1838fb) to head (69de0e8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4102      +/-   ##
==========================================
- Coverage   85.49%   85.17%   -0.33%     
==========================================
  Files         991      991              
  Lines      173091   173087       -4     
==========================================
- Hits       147988   147420     -568     
- Misses      25103    25667     +564